Lining for jar-caps and method of sealing jars



E. BEAVERS AND W. A. WEBBEH.

LINING FOR JAR CAPS AND METHOD oF sEALlNG JARS.

Patented June 21, 1921.

APPLICATION FILED JUNE 30,1919.

@Moving WILLIAM A. WEBBER, citizens of the United .A

f UNITE-D .STATES P.A-*rENjrv OFFICE.

ELMEn. BEAvEns, or WALTEAM, AND WJLLLIAMA.` wEisBER, or warnnrown;

MASSACIITIIJ'SETTS,l ASSIGNOBS T0 SANI-TITE CAP COMPANY, MASSACHUSETTS,A CORPORATION 0F or izos'ci'on',4 MASSACHUSETTS. f

LI'NING FOR T AR-CALPS AND METHOD 0]?*Sll'iALIIsl'Gt JARS.

To aZZ- whom t mag/cantera.' i

Be it known that we, ELMER BEAvERs and States of America, Waltham, thelatter the county of Middlesex land State of Mas-` sachusetts, haveinvented new and useful Improvements in Linings for Jar-Caps andMethods-of Sealing Jars, of which the following is a specification. i l

The object of the invention is to provide an inexpensive and eiicientlining for the caps of fruit jars and similar receptacles which shall bereplaceable or renewable after each use of the jar or container, whichshall the former residing at l ei'ectually prevent contact between thecontents of the jar and the metal of the cap, which shall eilectuallyprevent the escape of liquid or other contents ofthe jar, and whichshall constitute a hermetic sealing agent for the joint between the capand the jar s0 'as to prevent the entrance of air.

In the present practice it is common to use jar caps or covers havingpermanent linings of non-corrosive material such as porcelain or thelike depending upon a rubber illustrated are of jar to exclude air afterthe jar .has` been closed, but not only is there anelement ofuncertainty, with regard to the eiiiciency vof the air seal provided bythe rubber gasket, but owing to the fact that the porcelain or otherlining of the cap does not seat upon and form a moisture proof jointwith the 'neckofthe jar, the said liningto become more or less loosefrom the metal of the cap, the liquid contentsv of the jar `findingtheir way to the metal and owing to the acid content thereof in theevent of fruit or vegetables constituting thel contents of the jan-thereis at once induced a reaction resulting in a more or less injuriouscompound or poison Vwhich affects the contents of the jar and the leastinjurious efect of this contact and contamination is tto cause thedeterioration or de- It is the object of this invention to rovide alining forpreventing contact un er any f' circumstances ofthe contentsliquid or otherwise of the jar with the metal'or other 1naspecificationof Letters rama. Patented Applicationled June 80, 1919. Serial No.307,835.

at Watertown, both 'in' portion, as well be resorted to within the scopeof the claims Aseating gasket l2 for and there is a tendency for' June21, 1921;

terial constituting the cover and at the same 'time to provide a I maybe substituted for that afforded by the rubber gasket, so asto'positively exclude air from the interior of the jar after it has beenclosed, so as to prevent the deterioration of the contents by reason ofoxidation and with this object in View the invention c onsists in aconstruction and combination of parts hereinafter specificallydescribed, it being understood that changes in form as details ofmaterials, may

without departingfrom the principles involved. f

In the drawing.: v Figure 1 is a sectional'view ofa jarand cover havingcover lining and sealing means embodying the invention applied in theoperative position thereto.

Fig. 2 1s a .slmilar view showing-y the cover and the related parts orelementsof the sealing and lining means separated from, the jar in therelation which they occupy when muse. The jar l0 and screw cap or coverll as the conventional forms now 1n common use in preserving fruits andvegetables by either the steam,

with the usual rubber the contact of the lower edge of the lflangeorring 13 of the cover as in the ordinary practice, although the use ofsuch gasket is unnecessary under ordinary circumstances when the jarsare provided with the vcover lining and s ealing means constituting thesubject matter o-thls invention.

Disposed upon the jar being provided mouth. ofthe jar and adapted to rbe seated thereon immediately. after the flllingiof the receptacle isawaxed or paraiiined paper disk 14 having a slightly seal whichsupplements ory sterilizing or cold packed methods,.the shoulder of thedownturned peripheral flange or lip-15, and

seated upon this disk is a second -disk of wax or paraiiin or of asoft'onspong'y vehicle such as blotting paperor the like 'impregnated orSaturated withwax or parain underV such conditions as to readilyliberate the latter upon the application-of a moderate degree of heat sothat ifthe contents of the jar 'areA packed in a hot state the disks'being arranged as described having and cover screwed into place, the hatOf the cap.

and .will cause I hanging lip of the protecting `but it is the purposethe contents of the jar will soften the wax or paraffin in the upper ordistributing disk the same to flofw down over the lip of the inner orprotecting disk and into the space between the flange of the cover andthe neck of the jar or between the threads by which said parts areconnected so as to constitute a hermetic seal. The overdisk serves toprevent the wax or para from running into the jar and directsJ it to theoutside of the neck where Vit vis disposed to constitute an effectiveseal. The heat also serves to soften the wax or paraffin with which thebase or body of the protecting disk is formed, so that a jointure of thedistributing and protecting disks is effected and the portion of theparaffin which flows outward over the peripheral lip of. the protectingdisk'and into contact with the surface of the jar neck below the same,practically form's -in connection Kwith the amalgamated 'disks acomplete sealing cap which to all intents and purposes is partxof thejar neck and retains such condition and function so long as thetemperature to which the jar is exposed is below the melting point ofthe par- Obviously in the removal of the cap or cover from the jar/theseal is broken and the utility of the sealing means is destroyed, to usethe indicated sealing means only once, so that a new and sterile set. ofsealing elements may be employed in each subsequent use of the jar.

If the contents of thejar are prepared under the cold packed process ormethod it is necessary simply to dash hot water upon the cap aftersealing the same on the jar to cause the distributing disk to softensufficiently to form the seal as above described.

From the above description it will now be clear that the disk 16impregnated with sufficient paraihn vtol flow into and close the jointbetween the skirt .of the cap 11 and the neck of the jar as well as toseal the joint between said disk 16 and the chine of the jar mouth, isthe essential and important feature of our invention. The disk 14 visnot an essential element and may, if desired, be,

and sometimes is, dispensed with. It 'has been common heretofore tolinsert a paraffined disk wlthin the cap of a fruit jar or iwith shellac,varnish or the like.

like container, but such disks `have only, heretofore, been providedwith enough paraffin to render` them impervious to the liquid contentsof the jar or otherl container. In

other words it has heretofore only been the practice to render the paperdisk liquid proof by paraffiningwthe same or coating it So far as weknow we are the first to provide a disk 16 of paper or other suitablefibrous material which isv impregnated or saturated with sucha quantityof paraffin that when the parafiin is melted by the heat from thecontents of the jar, or from any other source, not only is the jointbetween the disk 16 and the chine of the neck of the jar perfectlyclosed and sealedbut the paraffin from the disk also flows down into thejoint between the threaded skirt of the jar cap and the neck of the jar.

The invention having been described, what is claimed as new and usefulis:

1. As a new article of manufacture a disk of sheet material adapted tolbeused within the` cap or top of a fruit jar or the like, said diskbeing coated with a quantity of parafiin or the like sufficient to flowinto and close the joint between the skirt of the jar cap and the neckof the jar when heat is applied thereto.

2. As a new articlebf manufacture a disk of fibrous material adapted tobe used withinthe cap or ton of a fruit jar or the like, said disk beingimpregnated with a quantity of paraliin or the like suflicient to flowinto and close the joint between the skirt of the jar cap and the neckof the jar when heat is applied thereto.

3. The method the like which consists in first filling the jar, thenapplying the cap of the jar to the latter with a paraffin coated disk ofsheet material within said cap and thereafter utilizing heat to melt theparaffin carried by the disk and causing lthe paraffin to flowdownwardly around the neck of the jar or the"like into the joint betweensaid neck and the skirt of the cap. i

ln testimony whereof we afiix our signaj tures.

nanna BEAVER-s.

LLiAM A. Wannen.

of sealing fruit jars and

